I think may boyfriend may be planning to cheat on me...

Sooo my (F20) boyfriend (M20) and I met in college and he recently moved to another college about an hour and a half away. He lives with his sister there and we’ve seen each other quite a bit but not nearly as much as I think either of us would like. So the problems started when my boyfriend and I went to a renaissance festival with his sister, her boyfriend, and one of her sisters coworkers/friend. We’ll refer to the sisters friend as K, she’s who I’m worried about. I left the ren fest a little early to spend some time with my little sister since we live close and apparently for the rest of the afternoon and night my boyfriend and K were spending their time alone together. Note she’s probably a solid 9 and I’m a 6 on a good day (which is rare bc I study wildlife and do field work most days). My boyfriend was also was saying they got along great and talked for hours while they walked around. I wasn’t too worried because I trust him but as time goes on I’m getting more worried. Fast forward a few weeks and they’re talking a ton on Snapchat and apparently they’re planning on going bowling together on a weekly basis. There’s also a heart by her name on his Snapchat (the the best friends one it’s the heart with an arrow right next to her name), it could be that it’s just her username but he didn’t bother to change it or anything when he usually deletes emojis off other peoples usernames. I’m not really sure what to do, I tried to mention it and he brushed me off and changed the conversation. I’d like to think he’d never do that, but I know the statistics with distance relationships too. Advice?

Edit: missing details

Submitted November 20, 2019 at 11:54PM

Sooo my (F20) boyfriend (M20) and I met in college and he recently moved to another college about an hour and a half away. He lives with his sister there and we’ve seen each other quite a bit but not nearly as much as I think either of us would like. So the problems started when my boyfriend and I went to a renaissance festival with his sister, her boyfriend, and one of her sisters coworkers/friend. We’ll refer to the sisters friend as K, she’s who I’m worried about. I left the ren fest a little early to spend some time with my little sister since we live close and apparently for the rest of the afternoon and night my boyfriend and K were spending their time alone together. Note she’s probably a solid 9 and I’m a 6 on a good day (which is rare bc I study wildlife and do field work most days). My boyfriend was also was saying they got along great and talked for hours while they walked around. I wasn’t too worried because I trust him but as time goes on I’m getting more worried. Fast forward a few weeks and they’re talking a ton on Snapchat and apparently they’re planning on going bowling together on a weekly basis. There’s also a heart by her name on his Snapchat (the the best friends one it’s the heart with an arrow right next to her name), it could be that it’s just her username but he didn’t bother to change it or anything when he usually deletes emojis off other peoples usernames. I’m not really sure what to do, I tried to mention it and he brushed me off and changed the conversation. I’d like to think he’d never do that, but I know the statistics with distance relationships too. Advice?Edit: missing details